Why is my contact showing offline when they are online?
This means the person you are trying to check has enabled the setting below:
the block checker doesn't function properly if this is enabled.
Is it possible I can have the code for this block checker?
Sorry, no this is isn't an open-source project.
Why am I getting a red X for the check?
This means either you typed an address that doesn't exist or the checker server is in downtime, try again and it should work :D